chore(deps-dev): bump vitepress from 1.0.0-alpha.46 to 1.0.0-alpha.76

Bumps [vitepress](https://github.com/vuejs/vitepress) from 1.0.0-alpha.46 to 1.0.0-alpha.76.
- [Release notes](https://github.com/vuejs/vitepress/releases)
- [Changelog](https://github.com/vuejs/vitepress/blob/main/CHANGELOG.md)
- [Commits](https://github.com/vuejs/vitepress/compare/v1.0.0-alpha.46...v1.0.0-alpha.76)

---
updated-dependencies:
- dependency-name: vitepress
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -52,7 +52,7 @@
     "unplugin-vue-components": "^0.24.0",
     "videojs-flash": "^2.2.1",
     "vite": "^4.1.2",
-    "vitepress": "^1.0.0-alpha.46",
+    "vitepress": "^1.0.0-alpha.76",
     "vitepress-plugin-nprogress": "^0.0.4",
     "vue": "^3.2.47",
     "vue-better-dplayer": "^0.0.8",